Since the end of violence in darfur what have been main barrier to foreign investment develop sudans oil reserves?

The end of violence in Darfur has not yet occurred, and hence has not impacted foreign investment or Sudan's oil reserves development. There's ongoing conflict and humanitarian concern in the region. Any analysis would highly depend on real-time updates on the evolving peace-building processes , international diplomacy and Sudan's internal affairs concerning Darfur. It's essential to refer to trustworthy and timely sources for current situation and investment prospects regarding oil in Sudan to fully comprehend the obstacles involved for accurate answers.